Javascript basic tutorial: The location of js code in the web page

We can place JavaScript code anywhere in the html file, but we usually place it in the head or body part of the web page.
Put it in the <head> part
The most common way is to place the <script> element in the head part of the page. The browser will execute this code when parsing the head part, and then parse the rest of the page.
Place it in the <body> section
The JavaScript code will be executed when the web page reads this statement.

The following code:

<!DOCTYPE html>
<html>
<head>
	<title>javascript</title>
	<script type="text/javascript"></script>
</head>
<body>

</body>
</html>

In this way, our js code is placed in the head tag

It can also be placed in the body, as shown below

<!DOCTYPE html>
<html>
<head>
	<title>javascript</title>
</head>
<body>
	<script type="text/javascript">
		
	</script>
</body>
</html>

Note : JavaScript as a scripting language can be placed anywhere in the HTML page, but when the browser interprets the HTML, it is in order, so the previous script will be executed first. For example, the js for page display initialization must be placed in the head, because the initialization must be done in advance (such as setting css for the page body, etc.); and if the function is executed through an event call, there is no requirement for the location.

Let’s take a look at the format of js code

<!DOCTYPE html>
<html>
<head>
	<title>javascript</title>
</head>
<body>
	<script type="text/javascript">
		document.write("HELLO    ");
		document.write("WORLD");
	</script>
</body>
</html>

Note: document.write is the output statement, we will talk about it later

Continuing Learning

new file

<!DOCTYPE html> <html> <head> <title>javascript</title> </head> <body> <script type="text/javascript"> document.write("HELLO "); document.write("WORLD"); </script> </body> </html>

submit Reset Code

Automatic operation

Javascript basic tutorial: The location of js code in the web page

ElementaryImperial CMS enterprise imitation website tutorial

ElementaryNewbies with zero foundation in WordPress build personal blogs and corporate websites

ElementaryUltimate CMS zero-based website building instruction video

ElementaryFront-end project-Shangyou [HTML/CSS/JS technology comprehensive practice]

IntermediateVue3.0 from 0 to build a universal backend management system project practice

ElementaryZero-based front-end course [Vue advanced learning and practical application]

ElementaryWEB front-end tutorial [HTML5+CSS3+JS]

ElementaryQuick introduction to apipost

IntermediateVue3+TypeScript practical tutorial-enterprise-level project practice

ElementaryLet's briefly talk about starting a business in PHP

IntermediateVUE e-commerce project (front-end & back-end dual project actual combat)

ElementaryApipost practical application [api, interface, automated testing, mock]